Apparatus for making drills



2 Sheets-Sheet 1. J. H. KANE.

APPARATUS FOR MAKING DRILLS.

(No Model.)

' PatentedApr.3,-1888-.

IN VENTOR (No Model.) 2 Sheets-Sheet 2.

J. H. KANE.

APPARATUS FOR MAKING D'RILLS. No. 380,577. Patented Apr. 3. 1888.

INVENTOR ATTORNEYS;

Uwrrnn STATES PATENT FFIQI'J.

JOHN H. KANE, OF HUNTINGTON, WEST VIRGINIA.

APPARATUS FOR MAKING DRlLLS.

SPECIFICATION forming part of Letters Patent No. 880,577, dated April 3,1888,

Application filed May 27, 1887. Serial No. 239,539. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN H. KANE, of Huntington, in the county of Gabelland State of IVest Virginia, have invented a new and 5 ImprovedApparatus for Making Drills, of which the following is a full, clear,and exact description.

This invention relates to a novel form of machine that is applicable foruse in the making of straight and spiral ground drills, the object ofthe invention being to provide for the cheap manufacture of drills ofuniform and standard size; and to the end named the invention consistsof a pair of grooved rolls, a roll-advancing mechanism, a gage arrangedin connection with the rolls, and a gage'operating mechanism, all aswill be hereinafter more fully described, and specifically pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

Figure 1 is a perspective view of my improved drill-making machine. Fig.2 is a front elevation of the machine. Fig. 3 is a crosssectionalelevation taken on linear m of Fig. 2. Fig. 4 is a view of one of thedrill-blanks, representing the same as it appears after it has beenrolled to the required form. Fig. 5 is a sectional view of the blankshown in Fig. 4., the view being taken on line y y of said figure. Fig.6 is a face view of one of the drill-blocks or twister-sections Fig. 7is a crosssectional view of the drill-block or twister, and Fig. 8 is acentral vertical sectional view of the automatic stopping attachment.

In the drawings, 10 represents a heavy framework, in which there aremounted two rolls, 11 and 12, said rolls being formed with as manygraduated grooves, as 2, 3, and 4, as are necessary to operate properly,the grooves of each roller being formed with a cut-away portion, 5,which portions are arranged so that they may be thrown into register, asis shown in Figs. 2 and 3.

The shaft 14. of the roller 11 carries a fixed gear, 15, said gear beingupon an outwardlyextending sleeve, 16, which serves as a bearing for ashaft, 14, the axis of said shaft being in a line parallel with that ofthe axis of the shaft 14.. This sleeve 16 is integral with one section,6, of a clutch, 20, the other section, 7, of said clutch being formedupon asleeve,16 that is carried by the shaft 14, and arranged to revolvetherewith, the sleeve riding upon a feather, 17, that is carried by theshaft.

The sleeve 16 has a groove, 18, in its pcripheral face, and this groove18 is entered by the bifurcated end of a treadle-lever, 19, thearrangement being such that when the treadle end of the lever is pushedin the direction of the arrow shown in connection therewith in Fig. 2the two clutch-sections will be brought into engagement and a rotarymotion will be imparted to the gear 15, and consequently to its shaftand to the roller 11 mounted thereon. The gear 15 engages with a gear,21, that is mounted upon the shaft 22 of the roller 12, and-as the gear15 is revolved it will impart a rotary motion to the gear 21 and to theroller 12, controlled thereby, the two rollers being moved in unison, sothat the cut-away portions 5 of the grooves 2, 3, and i will be broughtinto register at each revolution of the rollers.

In order that the rolls 11 and 12 may be an.- tomatically stopped at theend of each revolution, I form the sleeve 16 with a groove, a, that isentered by a spring-pressed stop, I), mounted in a standard, a, which issecured to the bed-plate beneath the sleeve 16, the standard beingformed with a slot, d, through which there extends an arm, 6, which isrigidly connected to the stop I), the arm being arranged so that it willbe borne upon by the treadle 19 and depressed as the treadle is moved tothrow the two clutch sections 6 and 7 into engagement.

The treadle-lever 19 is provided with an arm, f, to which there isattached a weight, g, the arrangement being such that immediately afterthe pressure upon the treadle 19 is relaxed the weight y will act tothrow the two clutch-sections out of engagement, and then the stop I)will be free to rise into engagement with the groove a of the sleeve 16,the slot being preferably arranged above a spiral spring, 11, as shownin Fig. 8.

In advance of the rollers 11 and 12 I mount a gage-bar, 23, that iscarried by an arm, 24, said arm being in turn connected to a slide, 25,that is supported by two posts or standards, 26.

A pitman, 28, serves to connect the slide 25 to a crank-arm, 27, that iscarried by the shaft 14, the pitman being adj ustably connected to theslide 25 by a block, 29, the wrist-pin 30, by which the pitnian isconnected to the crank, being also adjustable, the crank-arm and theslide being formed with longitudinal slots, as indicated. From thisconstruction it will be seen that the gage may be set at any requireddistance from the rolls, and that as the rolls are advanced the gagewill be carried away from the rolls during the first half-revolutionthereof, to be returned to the position shown in the drawings during thelast half-revolution of the rolls.

In operation the blanks from which the drills are to be formed areheated and are taken by the operator and passed through the spacebetweenthe rolls 11 and 12 formed by the cut-away portions of the grooves attimes when said cut-away portions are brought into register, the heatedblank being shoved inward until its end strikes against the gage 23. Assoon as the end of the blank strikes the gage the operator depresses thetreadle-lever 19 and throws the clutch-sections 6 and 7 into connection,thus advancing the rollers 11 and 1 2, the gage being carried outward atthe same time to allow for the forward movement of the blank. After theblank has passed between the rollers it falls upon an inclined chute,40, and slides toward the operator, who again. grasps it with propertongs and passes it through another set ofgrooves,the gage 23 havingbeen returned and the rolls having been automatically stopped the momentthe cutaway portions 5 come into register. The idea of forming thesecutaway portions 5 and of providing the gage 23 is toprovide for thepassage of the drill-shank and to cause the ribs of the grooves 2, 3,and 4 to strike against the drill-blank at the same place at eachrevolution of the rollers. After the drill-blank has been rolled, asabove described, it will assume about the form illustrated in Figs. 4and 5that is, there will be formed in the peripheral face of the blanktwo concave parallel grooves which extend from one end of the blank tothat portion which is to constitute the shank of the blank.

Drills of this form mightbe used as straight drills; but in order that aspiral twist may be imparted to the drills I employ a sectionaltwist-block, 50, of which the section 1; is rigidly connected to anyproper baseas, for instance, the base of the machine-while the section76 is mounted to slide upon the base, being moved forward and back by alever, Z. When the faces of the two sections are brought together, therewill be an aperture between the faces, said aperture being circular incrosssection except for a pair of convex-faced ribs, which extendspirally about the aperture, so that in reality the crosssection of theapertn re corresponds with that of the drill-blank.

After the blanks illustrated in Figs. 4 and 5 have been formed they areseized by any proper implement and placed between the sections 03 and k,the section It being forced up toward the section 2', and thedrill-blank is then forced forward and backward through the aperture 51,and as the blanks are so forced forward and backward a spiral form willbe imparted to their grooves, as illustrated at 52 in Fig. 1, To finishthe drills the shanks are turned up upon a lathe to fit the presssocket, after which the drills are hardened, the clearance being rolledin the back and the edges being trued up along the grooves by means ofan emery-wheel that is attached to the sliderest of a lathe, the drillbeing revolved slowly, while the wheel is revolved at a high rate ofspeedsay two thousand a minuteand as the wheel is started at the shankand moved toward the point of the drill it will be somewhat worn when itreaches said point, and consequently will grind so as to produce thenecessary taper for the clearance of the drill, and the drills beingfinally pointed or ground, they will be ready for use. i

A saving of at least thirty per cent. of material is gained by theabove-described process of producing drills, as the material is drawnout instead of being cut away by a lathe and milling-tools; and,out-side of the question of material, long drills can be manufacturedabout as cheaply as short drills, and the spirally-twisted drills, whichare in great demand and would be more extensively used except for theirvery high cost, are produced at an exceedingly low rate.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. In a drill-making machine, the combination,with grooved rolls, of a reciprocating gage held in front of the rollsand operated from the shaft of one of the said rolls, substantially asherein shown and described.

2. In a drillmaking machine, the combination, with a pair of rollsprovided with grooves having cut-away portions, of a gage held in frontof the rolls and a connection between the gage and the shaft of one ofthe said rolls for reciprocating the same, substantially as herein shownand described.

3. In a drill-making machine, the combination, with grooved rolls, theshaft of one of the rolls being provided with a crank-arm, of a gageheld in front of the rolls, a slide to which the gage is attached, and apitman connected I to the said crank-arm and slide, substantially asherein shown and described.

4. In a drill-making machine, the combination, with a pair of groovedrolls formed with cut-away portions, and intermeshing gears carried bythe shafts of the said rolls, of a clutch-section carried by one of thesaid gears, a second clutch-section carried by the drivingsection, alever for throwing the clutch-sections in and out of gear, and astopping device operated by the clutch-operating lever, substantially asherein shown and described.

5. In a machine for making drills, the cornbination, with a pair ofrolls formed with graduated grooves having cut-away portions 5, ofintermeshing gears carried by the rolls, one of said gears being madeintegral with a sleeve which constitutes the bearing for one end of thepower-shaft, aclutch-section formed upon said sleeve, a sleeve mountedupon a feather carried by the main power-shaft and formed with a secondclutch-section, a means for throwing the two clutohsections intoengagement, and a means for automatically releasing the said sections, agage, a slide to which said gage is connected, and a pitman connected tothe slide and to a crank-arm that is carried by one of theroller-shafts, substantially as described.

6. In a drill-making machine, the combination, with a pair of groovedrolls and intermeshing gears on the shafts of the said rolls, of agrooved sleeve attached to one of the gears and a spring-pressed stopfor engaging the groove of the said sleeve, substantially as hereinshown and described.

7. In a drill-making machine, the combina tion, with a pair of groovedrolls, intermeshing gears on the shafts of the rolls, a clutch, onesection of which is provided with a groove, and clutch-operating lever,of a spring-pressed stop for engaging the groove, provided with an armengaged by the clutch-operating lever, substantially as herein shown anddescribed.

JOHN H. KANE.

\Vitnesses:

THOS. W. TAYLOR, D. L. KANE.

